2 sentences

1. 体育锻炼有助于你的大脑保持敏锐。

   tǐ​yù​duàn​liàn yǒu​zhù​yú nǐ de dà​nǎo bǎo​chí mǐn​ruì.

   Physical exercise helps your brain stay sharp.

   Source: CCMatrix

2. 体育锻炼是你可以为大脑做的最好的事情之一。

   tǐ​yù​duàn​liàn shì nǐ kě​yǐ wèi dà​nǎo zuò de zuì​hǎo de shì​qing zhī​yī.

   Physical exercise is one of the best things you can do for your brain.

   Source: CCMatrix